This page not only has a link to the wiki presentation, also has links to similar presentations for Voicethread, Wordle, Pocket Video, Google Docs, Interactive Whiteboard, search engines and Twitter!
Thinglink is a new web tool that allows images to be uploaded and tagged with hot spots. These hot spots can be text, links to web based content, or YouTube videos.
From the National Endowment for the Humanities. Links and lesson plans for Arts & Culture, Literature & Language, Foreign Language, and History & Social Studies
Using PageFlakes (like iGoogle) as a homepage for links. NetVibes allows you to create a page and "broadcast" it so the whole class can use without being logged in (like you must be in iGoogle).